Jinn (Arabic: Ø§ÙØ¬Ùââ, al-jinn), also romanized as djinn or anglicized as genies (with the more broad meaning of spirits), are supernatural creatures in early Arabian and later Islamic mythology and theology. An individual member of the jinn is known as a jinni, djinni, or genie (Ø§ÙØ¬ÙÙ, al-jinnÄ«). They are mentioned frequently in the Quran (the 72nd sura is titled SÅ«rat al-Jinn) and other Islamic texts.
Once you tighten up and lose range of motion in your arms, it reduces stride length, which is difficult to get back without burning a lot of energy. While sprinting, it is important to get a full range of motion with the arms. Remember, speed is a product of stride length and stride frequency. Stride length and frequency are determined, in part, by the motion of the arms. If you are lazy or passive with your arm action, you are limiting your potential for speed.
Sprinters typically have more definition to the tone in their legs and abs than distance runners. This is because sprinting targets six specific muscle groups: hamstrings, quadriceps, glutes, hips, abdominals and calves.Sprinting is a total body workout featuring short, high-intensity repetitions and long, easy recoveries. To sprint means to race or move at full speed, according to Health and Fitness Solutions.his is known as a hip extension. When the foot strikes, the hamstrings and quadriceps co-contract to stabilize the knee during ground contact; then, as the leg pushes off, the hamstrings help with forward propulsion. These muscles also assist in stabilizing the body while sprinting.